Expanded Perlite has a course, cavernous texture and is extremely lightweight. It typically won't hold much more than 1% moisture. When mixed with other growing media, perlite ensures good drainage while significantly reducing run-off of smaller components within the mixture. Because of the coarse texture, impaction is significantly reduced. The other ingredients in our mixture helped us achieve the level of moisture retention we were seeking, that's why we choose perlite rather than vermiculite. The addition of Perlite in our media helps to maintain the integrity of the overall mixture while insuring proper drainage.
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